التفاصيل البيبلوغرافية
| العنوان: |
A novel synthesis of quaternary nanocomposite as a potential adsorbent for removal organic pollutants (benzene and toluene) from produced water. |
| المؤلفون: |
Ali, Hager R., Mohamed, Rasha S., Mubarak, Mahmoud F., Shahawy, Abeer El |
| المصدر: |
Desalination & Water Treatment; Jul2021, Vol. 227, p42-57, 16p |
| مصطلحات موضوعية: |
OIL field brines, CARBON films, TOLUENE, POLLUTANTS, BENZENE, MASS transfer coefficients, SORBENTS, NANOCOMPOSITE materials, WATER purification |
| مستخلص: |
This paper presents an experimental study on the fabrication and testing of quaternary nanocomposite MCM-41/SBA-15@ACTF/ZIF-8 as an adsorbent to remove benzene and toluene from the produced water. To the best of our knowledge, this nanocomposite is novel. Any research group has not investigated it. The ZIF-8, a nanostructure with amorphous carbon thin film (ACTF), and the mesoporous silica order (MCM-41, SBA-15) were also synthesized in the present study. The incorporation of silica and ACTF synthesized the quaternary composite into the ZIF-8. All adsorbing materials have been evaluated by measuring the water adsorption uptake and characterizing the surface using X-ray photoelectron spectroscopy, Fourier-transform infrared spectroscopy, transmission electron microscopy, and scanning electron microscopy images. It was found that the adsorption rate constants of the quaternary nanocomposite (MCM-41/SBA-15@ACTF/ZIF-8) were 0.494 and 0.413 g/g min for benzene and toluene, respectively. Additionally, the adsorption rates measured in a batch reactor under a wide range of operating conditions were found to agree very well with the homogeneous surface diffusion model with a surface diffusion coefficient that increases exponentially with surface concentration. This indicates that the hydrodynamics effects in the liquid phase of the external mass transfer coefficient have been considered. Besides the batch study, continuous flow columns have been investigated. The breakthrough curves were obtained by varying the flow rate (3, 6 and 9 mL/min), the initial concentration (520, 500, and 1,000 mg/L), and the bed height (3.5, 5.5, and 11 mm). It was found that; the optimum conditions occurred at a low flow rate (3 mL/min), of initial concentration (250 mg/L), and considerable bed height (3.5 mm). The batch and continuous flow column results were evaluated using the isotherm models, which indicated that the continuous flow column study is more preferred than the batch treatment. In continuous adsorption, the benzene and toluene was effectively removed at low benzene and toluene all influent concentration, low flow rate, and high bed depth. The experimental data were consistent with the Thomas model. The high physicochemical pollutants in the wastewater were successfully treated in batch and fixed-bed systems to fall within the WHO permissible concentrations. Also, it was concluded that the Bohart–Adams model successfully predicted toluene desorption rates in the aqueous phase under various operating conditions after accounting for irreversible adsorption using toluene transport parameters estimated from the adsorption studies. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |
